What engine does GMC use?
GMC relies on General Motors' engine families across its lineup, with gasoline V8s and turbocharged four-cylinders, a diesel inline-six, and a growing electric option in the GMC Hummer EV. Engine availability varies by model and year.
GMC's engine lineup in brief
Here's the core set of powertrains commonly found in GMC trucks and SUVs today. Note that not every engine is offered on every model or trim level.
- 2.7L turbocharged inline-4 gasoline engine
- 3.0L Duramax turbo-diesel inline-6
- 5.3L V8 gasoline engine
- 6.2L V8 gasoline engine
The above engines power the most popular GMC models, including the Sierra pickup and Yukon SUV, with availability tied to trim and region.
Electric propulsion option
In addition to traditional internal-combustion engines, GMC also offers electric propulsion in the GMC Hummer EV, which is built on GM's Ultium platform.
- GMC Hummer EV: electric three-motor drive system delivering high performance with all-wheel drive and a sizable battery pack
The Hummer EV represents GMC's entry into fully electric propulsion, complementing its gasoline and diesel offerings in the brand's lineup.
What this means for buyers
Choosing the right engine
Buyer decisions depend on needs such as towing, payload, and daily usability. If you need heavy towing or hauling, the 5.3L or 6.2L V8 options offer strong performance. If fuel efficiency and modern power plus brisk acceleration are priorities, the 2.7L turbo I4 is a compelling choice. For diesel torque and efficiency on tough workdays, the 3.0L Duramax is the main option in many trucks.
Note that engine availability varies by model and year, so check current GMC brochures or dealer configurations for the exact options on a specific vehicle.
Summary
GMC uses GM's engine families across its lineup, including gasoline V8s (5.3L and 6.2L), a turbocharged 2.7L inline-4, and the 3.0L Duramax diesel inline-6, with an additional electric option in the GMC Hummer EV. Engine availability depends on the model and year, so buyers should verify current offerings for their preferred GMC vehicle.
